Year	Years
1800	35.7
1801	35.7
1802	35.7
1803	35.7
1804	35.7
1805	35.7
1806	35.7
1807	35.7
1808	35.7
1809	35.7
1810	35.7
1811	35.7
1812	35.7
1813	35.7
1814	35.7
1815	35.7
1816	35.7
1817	35.7
1818	35.7
1819	35.7
1820	35.7
1821	35.7
1822	35.7
1823	35.7
1824	35.7
1825	35.7
1826	35.7
1827	35.7
1828	35.7
1829	35.7
1830	35.7
1831	35.7
1832	35.7
1833	35.7
1834	35.7
1835	35.7
1836	35.7
1837	35.7
1838	35.7
1839	35.7
1840	35.7
1841	35.7
1842	35.7
1843	35.7
1844	35.7
1845	35.7
1846	35.7
1847	35.7
1848	35.7
1849	35.7
1850	35.7
1851	35.7
1852	35.7
1853	35.7
1854	35.7
1855	35.7
1856	35.7
1857	35.7
1858	35.7
1859	35.7
1860	35.7
1861	35.7
1862	35.7
1863	35.7
1864	35.7
1865	35.7
1866	35.7
1867	35.7
1868	35.7
1869	35.7
1870	35.7
1871	35.7
1872	35.7
1873	35.7
1874	35.71
1875	35.71
1876	35.71
1877	35.71
1878	35.71
1879	35.71
1880	35.71
1881	35.71
1882	35.72
1883	35.72
1884	35.72
1885	35.72
1886	35.72
1887	35.72
1888	35.72
1889	35.72
1890	35.73
1891	35.73
1892	35.73
1893	35.73
1894	35.73
1895	35.73
1896	35.73
1897	35.74
1898	35.74
1899	35.74
1900	35.74
1901	35.74
1902	35.74
1903	35.74
1904	35.74
1905	35.75
1906	35.75
1907	35.75
1908	35.75
1909	35.75
1910	35.75
1911	35.75
1912	35.76
1913	35.76
1914	35.76
1915	35.76
1916	35.76
1917	35.76
1918	26.5
1919	35.76
1920	35.77
1921	36.3
1922	36.82
1923	37.35
1924	37.87
1925	38.41
1926	38.94
1927	39.46
1928	40
1929	40.52
1930	41.05
1931	41.57
1932	42.11
1933	43.17
1934	44.23
1935	45.3
1936	46.36
1937	47.44
1938	48.5
1939	49.57
1940	50.63
1941	45.52
1942	44.82
1943	42.51
1944	41.31
1945	45.53
1946	54.15
1947	58.09
1948	59.16
1949	60.22
1950	61.29
1951	61.21
1952	61.14
1953	61.26
1954	61.53
1955	61.98
1956	62.59
1957	63.33
1958	64.18
1959	65.07
1960	65.95
1961	66.72
1962	67.34
1963	67.75
1964	67.96
1965	68.02
1966	67.98
1967	67.94
1968	67.99
1969	68.14
1970	68.38
1971	68.95
1972	69.23
1973	69.37
1974	69.91
1975	70.06
1976	70.43
1977	69.77
1978	69.88
1979	69.52
1980	69.67
1981	69.77
1982	70.05
1983	70.17
1984	70.14
1985	69.85
1986	70.01
1987	69.42
1988	69.76
1989	69.92
1990	69.9
1991	70.37
1992	69.93
1993	69.74
1994	69.48
1995	69.43
1996	69.2
1997	69.39
1998	70.07
1999	70.86
2000	71.19
2001	71.13
2002	71.29
2003	71.61
2004	72.07
2005	72.41
2006	72.84
2007	73.23
2008	73.17
2009	73.33
2010	73.66
2011	74.47
2012	74.58
2013	74.77
2014	74.79
2015	75.12
2016	75.27
2017	75.4
2018	75.53